Malicious PDF — malware analysis report

Static analysis result for SHA-256 d452d13a9f91c557…

MALICIOUS

PDF

58.6 KB Created: 2021-02-27 01:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9b2ef1e494ed2a7557b79513f46df4d2 SHA-1: ff65fdef90fa268265c25c7b13842338ce47aceb SHA-256: d452d13a9f91c5572fbe864ebd8782a06b72df77cfa077531f2d0d0d2630a197
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily corrupted, suggests a lure related to appliance settings, which is then used to redirect to a link farm of disposable domains. The presence of external URIs and the link farm heuristic indicate a likely attempt to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8255

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/award?keyword=how+do+i+set+my+lg+washer+to+spin+only PDF link annotation
    • http://kupivse.xyz/3535182326897mb0.pdfIn PDF document text
    • http://wipesexijekem.22web.org/abortion_nsw_law_reform.pdfIn PDF document text
    • https://cdn.sqhk.co/vakusukereju/ajihcjh/zombie_sniper_evil_hunter_unlimited_money_apk_download.pdfIn PDF document text
    • https://wowiwega.weebly.com/uploads/1/3/1/4/131453904/e64d793f57829f.pdfIn PDF document text
    • http://italywow.info/dejalowobowarudecdoa9.pdfIn PDF document text
    • http://uscreditinquiry.info/tolosalasuzerigrzp5h.pdfIn PDF document text
    • http://baltika-trans.com/566141789259jkxg.pdfIn PDF document text
    • http://ketrovk.xyz/how_to_reset_ritetemp_thermostat_8022c65qoi.pdfIn PDF document text
    • http://formblckr1.xyz/vazikaxunedu5olpx.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/bijeviregi.pdfIn PDF document text
    • https://cdn.sqhk.co/setupemup/jirjdCX/nevobovivive.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/gc5RBib/dreamers_by_yuyi_morales_lesson_plans.pdfIn PDF document text
    • http://sarhello.online/temopuwuxaxogu64nl7.pdfIn PDF document text
    • https://nizakibete.weebly.com/uploads/1/3/4/3/134386075/8fa89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://govusilewirot.rf.gd/14210791565.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1F 5528 bytes
SHA-256: f73f9eb45ccf6fa3d1c8bbadaff52808fc654154d82936a9c6bce4de0c5590fa

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